G3XDY wrote > > I find the K3 APF invaluable for weak signal work on the microwaves. In > the microwave NAC contest last night I worked three stations over 600km > on 2.3 and 3.4GHz by aircraft reflection, and the APF really helped pull > the weak signals out of the noise. I generally use 1kHz width for CW and > my ears for the rest of the filtering, but the APF makes a really big > difference on those signals that seem just too weak to copy. >
Coming from a totally different operating perspective (low band DXing), I agree with John. For signals in white noise (i.e. at or below the noise floor), I use a wide XFIL (e.g. Inrad 500 with DSP setpoint at 600) and then carefully peak APF in 1 Hz steps using FINE. With any other signals in the XFIL passband including impulse noise (e.g. lightning), I do better without APF. 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/Re-K3-KX3-Operating-Tip-APF-audio-peaking-filter-for-weak-signal-CW-work-tp7558247p7558278.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
